Biology

Plant Biology and Classification

1,796 Questions

Plant Biology and Classification deals with the taxonomy, evolution, and morphological features of the plant kingdom. This collection offers practice questions on plant groups, taxonomic hierarchies, and specific plant characteristics. The questions are tailored for students preparing for biology competitive exams.

Plant taxonomyPteridophytesAngiospermsPlant morphologyAlgae and bryophytesClassification systems

Plant Biology and Classification Questions

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

Which one of the following hydrophytes has its roots fixed in mud and leaves floating on water?

  1. Ceratophyllum

  2. Najas

  3. Trapa

  4. Utricularia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ceratophyllum (hornwort) is a free-floating hydrophyte with roots that anchor in mud at the bottom while leaves float on or near the water surface. Najas is completely submerged, Trapa (water chestnut) has floating leaves but different growth form, and Utricularia (bladderwort) is also typically submerged or free-floating. The key distinction is Ceratophyllum's mud-anchored roots with floating foliage.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation

Which of the following is incorrect?

  1. Herbarium houses dried, pressed and preserved plant specimens.

  2. John Ray developed key for the identification of animals.

  3. The category division is used instead of phylum in case of plants which comprises of fewer similar features.

  4. The set of methods used in classification based on evolutionary relationship is called phenetics.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The statement- the set of methods used in classification based on evolutionary relationship is called phenetics is wrong.

Phenetics is an attempt to classify organisms based an overall similarity usually in morphology or other observable traits regardless of their phylogeny of evolutionary relation.

Multiple choice development of plants plant growth growth and development plant growth and development biology

Which of the following are the products of redifferentiation?

  1. Guard cells

  2. Bulliform cells

  3. Complimentary cells

  4. Subsidiary cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Redifferentiation is the event of losing the ability to divide by dedifferentiated cells, the plant tissue culture is an example of redifferentiation in which parenchyma cells are made to divide under controlled laboratory condition.
Interfasicular cambium and cork cambium are also examples of redifferentiation.
As guard cells are parenchymatous cells, which divide and then matures, it can also be considered as the example or product of it.
Multiple choice development of plants plant growth growth and development plant growth and development biology

In which of the following process differentiated cell returned to their original specialized form?

  1. Dedifferentiation

  2. Redifferentiation

  3. Vernalization

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Redifferentiation occurs when dedifferentiated cells regain specialized characteristics and functions. The question describes cells returning to specialized form, which matches the definition of redifferentiation in plant biology.

Multiple choice evs weather, climate and adaptations of animals to climate weather, climate and adaptation of animals to different climates climate and weather atmosphere and its components

To some extent viability of pollen grains depends on prevailing temperature and humidity.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The period for which pollen grains remain viable is highly variable and to some extent depends on the prevailing temperature and humidity. 
  • The pistil is developed and ovules reach maturity before the pollen grains are ripe. Hybrid seed production as soon as tomato hybrid cultivars gained popularity, ordinary conditions of storage pollen viability can hardly be retained.
Multiple choice biology multicellular structure: tissue defense mechanism in plants epidermal tissue system kinds of plant tissue permanent tissues and their types

Out of the following, find the odd one out. 

  1. Epiblema

  2. Muscle fibre

  3. Nerve fibre

  4. Skin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Muscle fibre, nerve fibre,and skin are present in the animal body. Epiblema is a special epidermal cells present in rootlets. They are specially adapted for absorbing liquids. Epiblema is present in plants. 

So, the correct answer is option A.

Multiple choice biology multicellular structure: tissue defense mechanism in plants epidermal tissue system kinds of plant tissue permanent tissues and their types

Protosteles are found in

  1. Bryophyta

  2. Gymnosperms

  3. Pteridophyta

  4. Angiosperms
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Prostele is a primitive and simple type of stele. It consists of a solid mass of xylem surrounded by phloem, pericycle, and endodermis. It is permanently present in adult stems of many living pteridophytes, e.g. Lygodium, Lycopodium, Hymemophyllus, and Selaginella. It is present in vascular plants. Protostele is of four types as haplostele, actinostele, plectostele and mixed protostele. Thus, option C is correct.

Multiple choice biology multicellular structure: tissue defense mechanism in plants epidermal tissue system kinds of plant tissue permanent tissues and their types

Cork cells posses ...................... on their walls that makes it impervious to gases and water.

  1. Suberin

  2. Lignin

  3. Pectin

  4. Hemicellulose
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Lignin is a substance, which is impermeable to water. It is absent in cork cells.
  • Pectin is not present in cork cells. 
  • Hemicellulose is permeable to water and gases.
  • Cork cells are dead and have cell walls composed of a waxy substance "suberin", which is highly impermeable to gases and water. This substance prevents water loss from the stem. 

So, the correct answer is option A. 

Multiple choice biology multicellular structure: tissue defense mechanism in plants epidermal tissue system kinds of plant tissue permanent tissues and their types

Which of the following sclereids are the characteristic of intercellular spaces of Nymphaea?

  1. Osteosclereids

  2. Brachysclereids

  3. Macrosclereids

  4. Astrosclerieds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Astrosclerieds is a sclereid having its cell wall drawn out into lobes or arms to form a more or less stellate body. It is found in certain xerophytes. Nymphaea contains large intercellular spaces, which occur in the petiole. These airspaces are surrounded by long columns of parenchyma cells. The columnar cells contain chloroplasts and are presumably photosynthetic. Part of a large astroscleried can be seen cutting across one of the parenchymatous fingers. These sclereids add some mechanical strength to fragile structure. 

Multiple choice botany asexual and sexual reproduction in plants structure of male and female reproductive structures structure of ovule gynoecium

The placenta is attached to the developing seed near the

  1. Testa

  2. Hilum

  3. Micropyle

  4. Chalaza
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The placenta is attached to the developing seed near hilum. It is the scar located nearthe edge where seed breaks from stalk of funiculus, i.e., connecting the seed with fruitwall and placenta. 


Rest of the options are incorrect as Testa is the outer most covering of seed, micropyle is a small opening in seed coatthrough which water enters seed and chalaza is a tissue where nucellus and integument are joined. Nutrients from the plant travel through vascular tissue in the funiculus and outer integuments through the chalaza into the nucellus. 

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Which of the following shows the maximum diversity?

  1. Algae

  2. Fungi

  3. Pteridophytes

  4. Bryophytes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Among the groups listed, fungi exhibit a very high degree of morphological and metabolic diversity, often cited as having more species diversity than the other listed plant-like groups.

Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

Which one of the following plays an important role in phosphate nutrition of plants? 

  1. VAM

  2. 1PM

  3. Legumes

  4. Cyanobacteria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Role of VAM in Nutrient uptake of crop plants:

  • Microorganism and their role in soil must be considered as a key component among those conferring soil fertility and productivity.
  • One of the most important plants-microbe interactions is the association of vesicular-arbuscular mycorrhizae (VAM) fungi with higher plants.
So, the correct option is 'VAM'.

Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

Which of the following pairs is mismatched?

  1. Azospirillum - Maize

  2. Mycorrhiza - Pine

  3. VAM - Mycoherbicide

  4. Rotenone - Natural insecticide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Azospirillum inoculations are recommended mainly for sorghum, millets, maize, sugarcane and wheat.
Mycorrhizal biofertilizers can be used for pine trees.
Rotenone is an odourless, colourless, crystalline ketonic chemical compound used as a broad-spectrum insecticide, piscicide, and pesticide. It occurs naturally in the seeds and stems of several plants, such as the jicama vine plant and the roots of several members of Fabaceae.
VAM is a biofertilizer and not a mycoherbicide. 

So, the correct answer is option C.